My craftsman with the Briggs and Stratton will not start unless I use starting fluid. It stays running afterwards. Granted it gets used a handful of times a year. I run my home brew ethanol free fuel since there are no stations around me that offer E0. Took the carb apart and everything was clean. Got it all back together and the same issue. During the winter I spray Amsoil power foam inside the carb as much as I could. The gap is good on the plug. There was slight rust on the fly wheel so i sanded it down. The gap is good for the coil. Is there anything else to check? Thanks.